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Mellite
Mellite

Chrysoprase
Chrysoprase



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Mellite
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Chrysoprase

Mellite and Chrysoprase Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Waxy

Pleochroism

Weak: yellowish brown yellowAnthony et al
-

Dispersion

0.010.01
0.005 1
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Transparency

-
Translucent, Opaque, Translucent to nearly opaque

Refractive Index

1.509-1.5411.530-1.543
1 3.25
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Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

0.0300.004
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Mellite and Chrysoprase Optic Character

Mellite and Chrysoprase optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Mellite and Chrysoprase Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Mellite and Chrysoprase optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

Mellite and Chrysoprase Transparency

Similar to their colors, Mellite and Chrysoprase transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Mellite is while Mellite is in appearance.